TPS61006DGS

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TPS61006DGS is a DC-DC step-down converter specifically designed for use in ultra-portable, battery-powered applications, such as low-power single-cell Li-Ion cellular phones, PDAs, and handheld computers. This high-integration device contains a switch in the feedback network to ensure good loop stability for high efficiency over the entire range of line and load conditions.

Features

• Input voltage range: 2.7 V to 5.5 V
• Fixed frequency peak current mode control
• Typical bottom side switch RDSon of 0.36 Ω
• Supports up to 1.2 A load current
• Programmable soft-start
• 2.5% internal feedback voltage reference
• Low shutdown current of 0.1 μA
• Cycle-by-cycle current limit
• Programmable output voltage
• Current mode loop

TPS61006DGS Application Field

TPS61006DGS is a DC-DC step-down converter suitable for a variety of low power applications such as local on-board voltage conversion in portable electronics, battery-powered systems, and sensor networks. These applications require low-power consumption, very fast transient response times, and low noise operation.

TPS61006DGS is designed to provide up to 1A of output current from a single Li-Ion cell and has very good efficiency over the entire line and load range. The device is optimized for a variety of loads and features an internal bottom-side switch with a typical RDSon of 0.36ohm for low power dissipation.

The switching frequency is programmable from 270kHz to 1.3MHz and coupled with a programmable soft-start provides the user flexibility in adapting the device to different application requirements. The device also includes cycle-by-cycle current limit, hiccup mode operation, and an adjustable shutdown current of 0.1μA.

TPS61006DGS Working Principle

The TPS61006DGS is a DC-DC step-down converter specifically designed for use in ultra-portable, battery-powered applications. The device uses peak current mode control to regulate output voltage and automatically adjust the device output voltage based on changing system load. The device also includes an internal switch with a typical RDSon of 0.36ohms for low power dissipation.

The device operation can be divided into four main parts: start-up, regulation, power saving, and soft-start. During start up the device regulates output voltage through peak current mode control which accurately regulates the output voltage during dynamic load conditions. During light load conditions the output voltage is maintained through power saving mode when the device is operating in an light load condition. The device also features a programmable soft-start that can be set from 0 to approximately 1µs.

The device features a 2.5% precision internal reference voltage and the output voltage can be programmed with external resistors. The switching frequency is programmable from 270kHz to 1.3MHz and is optimized to meet a wide range of operational application requirements. The device also includes cycle-by-cycle current limit and hiccup mode operation to provide protection against overload conditions.

The device also includes a programmable shutdown current of 0.1μA which can be used to reduce power consumption when the system is not in use.

Conclusion

TPS61006DGS is a high-integration device designed for low power, battery-powered applications such as single-cell Li-Ion cellular phones, PDAs, and handheld computers. The device features peak current mode control, low bottom side switch RDSon, programmable soft-start, 2.5% internal feedback voltage reference, cycle-by-cycle current limit, and programmable shutdown current of 0.1μA. The device is optimized for a variety of loads and provides excellent efficiency over the entire range of line and load conditions.

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